Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd32e8a350eeb645d646dfc58e3953ab21fbe23009d43c8e40df79787edca568' 
  AND token = 'lc2qgxpNsABwVQNwZqnKWmfO5msbLcM/25YTNDdrQgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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