Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3765aef829f89414daae0d9ff9b100e54a5c1001c2a6bcd28200f38ab5f08c84' 
  AND token = 'xpR3OHrdMv+Qs95RG/LpCI+smhi0XTd67i6YM8Qh3N4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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