Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6be87871ae636885049c6b617377f97d7e724525ec677d319722da400a39f48' 
  AND token = 'tfguX80RFHVN1+JZ+6+tcHOYcz1FJfJRcuwUPp+fDlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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