Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '188345f0820ecd3ea2d8062f989644125dbc75f9382c5d7bbfcee3512865490a' 
  AND token = 'kEXsNbMEe5bogAxuZC9v/xs8RbwepJX9VrdfwT9+RXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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