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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10142060eaed286b2f2dbbdc19aafb7dcf17222ae5d4e92fe54e8070c3975654' 
  AND token = 'tSuLUe+UyEmJ8PrJXacIHGMFX3sDs6U8J/fOAFSh7YA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}