Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '383dfc8c67b4e36ddc662b12d1c32a8033e9a7bcec336ca4087c17548d5fa0ad' 
  AND token = 'ymB8M+yQrwEapNAfvIV0bGdEFmy2ZgYcp+hErl0qP98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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