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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daf43e528046638bd3a4603c93ad5bc9ca29cd84af12edc2388432a7368b0b46' 
  AND token = 'W3l60BNuYGo5O5zTnd8P9u1gB1ZfDSQbTb1iKfGcwo4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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