Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa11f0dd375923e82fcaa5866fb76a995f79d5c5370b4f68a6ee499586de0c5a' 
  AND token = 'pYFN2LFsdFQrgirFkSRgeetkgNANxEllYCvMDOqv3hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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