Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1eb2826c60de5b8c2d9ad0cd14d6046809d3567cd94362ae7968d8442aeaa34e' 
  AND token = 'lgtdpRq/mHZH0NIFnjrW0dH3vfN7uv9FeG9BZb7H7L8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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