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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ee91e3f21e5d6e753a7c790e6a1f808da098654f2caaa9a7108bf3578ca88f1' 
  AND token = 'ahFUCwy0BvwJxypb9bI60YV6TywYFKBVRdIP886bI20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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