Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '090f48e9aa251d0aa16410aabe20af6365a87b957142369207138abbaac426a4' 
  AND token = 'bRpwvjWDZjUbRxukm/JxeUpm8mNxe2fVsU2r/w2DFS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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