Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd996af303126a599735cbfea4ff7a0e4622f41bce8b0def8a73a04e79b053660' 
  AND token = 'qxFt9yb72zbuf+cP4hvHjGDPg/UHXepI95/URjP6lEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00259

JSON explain

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