Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79014f026c193249a4aa96fa9ffef86bd9b58fedd24fcfd5d1935c7796c86809' 
  AND token = 'hw4GwijMOpF+bsgZIlR/8HEUDOU6ekt8kaUsSUmfVdw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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