Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42164cc9e662f67e92cfe1128a30e0519c9b8bb3769fe3c7fd41618878ba7b36' 
  AND token = 'lJ4pdcAlZuB5aADpdYEORyLrs0OdmTkVCUHToGkmT3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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