Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ef4f5e7bbd0bdc1aae654873a614f088b592a69e490c211ea9433e1d0f67f07' 
  AND token = 'E8i071S3hd+K2VW/dSqBH5jRnZS/jTx6NQCCLVjDolA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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