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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '361cffa412392cd173355301d22f2e15b631674ffede014f69fa29233bbf405e' 
  AND token = 'Dg3hdTrxxHeHrYFtRiBq45jVZYl4w3VjGOt4JlVNcu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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