Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1100ec10ce5766e51f7e4cd20ee8eb0ab3c902d0b250b294793cc867b092af6f' 
  AND token = 'GTsZoOFSBKeKJyoqbz+c72t+kzo8g6Fo+4o9XBxhhPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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