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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32ccb5a007a2773437d23b0f8a9de36878f67b4cfef2e841655697045904c572' 
  AND token = 'aYF0f4qbKDc29V1O8737b9be4knZ6Hh04B7BoLGdg4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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