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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10600c731bfbac8068cb511339654d6ee213d3d1065e58e5a19e167cfeb53196' 
  AND token = 'khln7DwBpOu7yqnRgNdS1fW0eT8OV9Zjp5rUOA7fyd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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