Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f79075ecddc7ecfed4dc71e46cf09e3f125e26fe93cc4fb294eaa075a33bde8a' 
  AND token = 'G3FDlR05PJONm80wU619iGUQSuXJpTWSLugzdNI5AcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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