Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c6db6bb5c0639f256e6920de4085c3fc0be041635b661df418f98f6e16c7334' 
  AND token = 'Z0P2X9xnevMnHoWi9lVbLE2LrkRq/CZkOAz1lc0s5Yk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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