Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5769dba57a0b751530206831b09eb063a359218fe2f89ce63620a5fa55972cb' 
  AND token = '/Ka6K3ed4lQa5MH3ciDwSGBvTZTjYuk7bbis4pPuv5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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