Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd676c9002ba64cbeb57442b3d9f15e5e3c29436ecc6627b5d902258cbda222d9' 
  AND token = '4edZB/7mlE1/OZVhTXqllyUt38aXbZzFYLigfHZfALw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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