Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3194da4af51b0c5bcb908ff07281b2507a2c6c60bdac146df724d36acb81c619' 
  AND token = 'de5Bmw1Q/Jf32oM3ddBI8i2at/3zEo1FsEPVmJ7oUWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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