SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ce89ba6b2525c217282e3cadd7f153052b1d6435af044944b2f49b31b86a44d' 
  AND token = 'WJw/gbM+W/QMXOpfcJvLzNwB9jYolVpltZc+PKTSL7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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