Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '08a9179aa537100a8edf181b4e1f83110c545cbca0b4dd8a83500c12ac28d86c' 
  AND token = 'GE/u+sAC+9w8g39xUB9+gTmvudjXgcZ/uWHxRlMMQH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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