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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0967a42844a6c30a43ed96f48e937f8dd40996147e4945e3dc30bd1899994823' 
  AND token = 'wMTkhV0e69+XvcPgaRbGMZDf2PXNMNEXlGwdb2BAJN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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