Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4e45a8269c0d2c7944c3be1d04bd57ce044cf54d16b4fe22041d50a524547b2' 
  AND token = 'dosfR7f8SIL5IJmmg+S1CCbnnuSMcz64HYk5XylgQHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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