Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd739443cd1e415436ab77a5fe196cda527a8c52e5cc862cb6ae4bc8132185366' 
  AND token = 'b/7r1HtTuBIRCu09HKUhzXYvt/uRSTTJhtzrwoSiFfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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