Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e426f75655d7e40318e8c7c62c2213e11e9205a1a9ac1d0e9f088517dd27e382' 
  AND token = 'r72JHtEDKACrAd8J7LMvI9X0/reWbGo2nNU3NbnP1pQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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