Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f44d58d97c9dc399c4dce620478e386afda97f632756dd401fcb2642e0d934b1' 
  AND token = 'wRacYFoz9rMLdhzNudb9/cWSOvK/WED73MAkrcgbMQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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