Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f601653c62bb510c68f684dd885c0e46aa4eb77ed3293c84e75c1bdc71c956da' 
  AND token = 'mcWBBY8qyq0WIQfTnIxYPv50XLVy6f9QbJyXcWZq2YI=' 
  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"
    }
  }
}