Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bad5c1489b357cdb5cf74d26e6f453e7ab4b69a74e42702a061c62176e94873' 
  AND token = 'CZtkCcszt99xrxRyZN2hNMjvGkvKJlssKuAtGNJ2dIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}