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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5e1b4b73152cfd0e7a65515f37bfaa2dc110ea81e6a4a44765373fd10f0e907f' 
  AND token = 'AzuLhOaaWx5QZo+HCGxyTAVnAe2xjPJvJ5PU1hL8vnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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