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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0ba9057ca5ccdf2aa1dde8e1e4855328e27823a01121df8ccb948e93c3810a31' 
  AND token = 'zIqVF0d5Zoxzwj58H6hMUa9SudFRGa6ZQXes89iKejY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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