SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9c98b1562e047dfa3888635cbeff6797eca60fd874feca6ec967027719ac5807' 
  AND token = 'DapqohvcOQjBvVxEZ/I4jaiv1kWGkmZJJqS2gNIKpxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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