Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15245f74bfb186e707e4064c4a0e7ec61d0d67b2fe072d194cb2d997c1c95fdd' 
  AND token = 'PV4Y9hCYYHKSX7zv2jU+iIsjPlEPMNeaP13lWH9FeOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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