Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d28c6fd56215c130309fdd16e517f23f79e126f604f69793ae1681395bb3aeb' 
  AND token = 'X+/dpKcKD4ntS8Zkmcwcwf+nw4BIndohTU1L+CeCj9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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