SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '8f11cdfa7bb5485d96f1e775e1b35f38657d7b9be9ffb82da8b9a5c7e2d6cc37' 
  AND token = 'M9/aBqQG41nJ/ngKDHSNGijILHGuRqXwi+GtuQKstiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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