SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '295bb63f33f7225504723201c1fbedf021053cd52a5733c79b483c28458cdbe0' 
  AND token = 'EFtmoyB8/nOWBZ4jMVGSQ0qmcxgHhdNNIMvd9MKIzxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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