Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee5d6f51d04241245f2e25406d819c9e2b67e34a1fc73092b3c3c97b4b891f22' 
  AND token = 'txpRVnNWG2K7kI6RiX4he8J+haYqO53B6C/I90rpOrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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