Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7f836a165cd92a70c113f90c463204d7923f58d12e10786f4f7fe8aeb1185a5' 
  AND token = 'wv3wm4Xhfk+p+AA6drHOti6ORa1MpOmuKITGVvcZ8cc=' 
  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"
    }
  }
}