Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '642820c8666a0fc5613ea763b72da02821d84838ccbcd9d59edd13d72bbbc499' 
  AND token = 'Iz4Gvev80l1K0tgyAZNH8DyWgaNEzBPd1BHvjzl5YNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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