Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a388c0167369e7c3b89b852d2926e43dffa7c09eaf28193c6ff67773b198f1d9' 
  AND token = 'X1HgvM7/kcDPbgB4sPIvLtnMS3+XHpDW/z05QJann+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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