Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd257ce3ad04edf1ad3a87bc0f94fd2e5bf170653fa9b1d2468ed5bba257195b' 
  AND token = 'leBX4sJindjUJYkc9b6mNXjz+Mnf7N/jHUhgW/G1aWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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