Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85e36fa48ca0ac6edf4a57b6e3ed79b31587e908726b7220fd7341cc35bcc7cf' 
  AND token = '9SRgAm+X0dt7dGGsGdwrdlyr3a/g5okKKrqEYzPEVaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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