Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8f4535d593deb8a571acb95a8e4b9844df41d816172141e8893c5d8cfdd1a7d1' 
  AND token = 'MlHAFD6iaRudZTWAMfGWkOIAm0Xg/ZWSmOM398amLx8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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