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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '609d7d33876d5ac636811124c9bd30fcffe636142bcdfb0283dc1bf1e6d28059' 
  AND token = 'sH+NpYyVQZiDuw6P4y4SOawOLwfI+EumNKrX6ySuS5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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