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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0118fa67bd6db69d0380f2c5050cd54b8d31526687a51140b5049c1563a421fc' 
  AND token = 'oSC+RidcZjqt2SQ99sN9L/VqR/Go0G9JINyPJ5Zyyqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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