Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a044343ddd6228b0d38f673ed7c4abae3257b07ac765de34ea8a5fcf62547143' 
  AND token = 'igF2x7kTk+aXLds2LkWdu8NCshejNuKUXOQfy9LMWRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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