Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f71065a1865c5724e66b6ccdd0cc609bca5b3bf278274960c6c5922b00e8f08' 
  AND token = 'c/z083pu6LkvBG9CwSmsncWNp3jH+TkO6yyiobS9aZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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