Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd275bb4caf989656e4fcee99714e74195aad5571a48ccdff0e2f128b6856e57' 
  AND token = 'FG8p5aDas162yqhztq7E4RfuIGIMxMbZdL5gYEEJ/1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}