Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0befe243b562419ca7a1aaeca0ea64b76a3753c8471fa85394aee8a3f8bd232d' 
  AND token = 'xmvOrXSKI3pYfESurzOot3amMOzULFbL4zaAag6v74w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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