Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de53b30b213af60158df558423f9412f36ce7a4e7a66fce50b3a48ef5f3ecc03' 
  AND token = 'DVDe3t+R3gdsY8QqIAx+nXjqxZvSoOOS3YQWoaggCI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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