Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bb5c54bcd097a689b4bd22c16e27acee809fbbcac04ac43be22a4e58d4a2fe9' 
  AND token = 'FPILcYadWf0bt3dTNc8p6zQ6Kw0SZLMQNKDibg8y8AM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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