Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '989591317c1ba251788b4ef67e9ccf97883674a0d2d3a312f0d3ac903ca51c8d' 
  AND token = 'px4TBVX6vJ8uHE0HWeLXeDE3pDYDwNAzCecinvQkUxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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