Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '699ff49b0a12ac83ef38918b1f44c74039ff2d9ba033b989be609e79904f5a97' 
  AND token = 'kDZoZ22DkwqCs3EMN8/9nfasGMzIzczQktzJ9R8j0Rs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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