Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6402460982d5fbf6b4acd8c5a6e1e0ee174225aa63df685d4c8e8cfae1659fc2' 
  AND token = 'jgouXH5Szs61sr0SfcAAXpy7B9GyWHcnSdj2fZc0b5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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