Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f869f6affda921b8accf4ca339d13d449311ec6855a300c7f81b483afb55bbc5' 
  AND token = '8QVv1fxh33dKmrqDEoHTJJ02E4rhQWdVyOm571jGtgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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