Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0352647c42bd5d6555f81401912eae65e79380c4369970cf5a6e1b081870f8c4' 
  AND token = '4/kWZbjuQcK9/wNdi2rWD06ZgCbuTzqETjT876NaMl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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