Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '9f11b9bb99c10e3f57eb93c64d57e27a41ac159e7eecbe31547d2ac9b50f14cf' 
  AND token = 'Ql+urgf9kmGeHBjvAa9KclZNpe//jsz3Y9MFJTgHNcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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