Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9388836b1b46dd9a9c2c7bdb870e1ed74885d5dca0b4a997ab0fc41a0ceebf71' 
  AND token = 'AekUnvwuQ9RIbiT/wSYyWsZVtRox/gEoC/EB6TTc9Cw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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