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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30c2e08c1b1620ebac761a447af6fd09adbb91b2fc04785ff24b7e0cbf0b14ad' 
  AND token = 'yMQVe9q5DXaRb5h+k9U9AYDlzei2/1gdmlaZhoJYogo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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