Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b120d6723890918e49f4a294091f1792807af6f33f7bdec7b8154f2d53d541d8' 
  AND token = 'VsurK11icnOddvxGGVfqX4ClL0kPr6laaiSsbZRyE0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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