Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd606f3c89030eca52763818a7825fcf08b868ceadaa90eedceb2b74ffb40561f' 
  AND token = 'lh4t4vRgdG8QJhC1jHWEBcuR53KbHuWKxJuMeM2gF9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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