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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfa0d6bc8f57cb0b3b4575d5c04817b25f3ad67f82c00bf36b8b38d7ddf8d89f' 
  AND token = '7Vs5f7i/xk2nPga7Q4IZ475Qoh9ue296X6honXiylO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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