Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8f97de6a4673af1c5205f915c170a863b26e8cd7c26936e33095944573f1a0ac' 
  AND token = 'aWop/fUkgnqW8W/FWChcSFHAzXx67jMP9d5W11DO9yA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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