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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2581e80d8f136a615400c3893a3b2b56b900a9f0138e6309826ac76bacada1ce' 
  AND token = 'UruNsUBHbkz/0eKOSdHJX6QgkauJu+VYeyWE0Uxr7q8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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