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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b051c32b7e6bb366d24c1a916cfbd3069cb302e060e1e9ca0aaf51ae92b1d52' 
  AND token = 'H1pPrbh9q3hRpRV7ZN0oos6RFD+E8U/Itz8Hy1wGMgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}