SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '555d6904328268235fc9b8518c2434d47358ca75221111b9623994d7c0772e86' 
  AND token = 'FLCmrSJBLhf9gwWRWqYnuMig2LnIWDL0sihzY4rgUVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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