Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd63ff1a1408a472f518745e938092ad906a37a12f62bc6e884d830b1bf8406d0' 
  AND token = 'mUtskTGxnwiAOJzQggvDrqIbOmCaO7U3KnLI99IIImA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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