Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c82315f5550c197110aea4d36d56b0c27e5899a3f76fbb4cad37a1bd96f6ca7e' 
  AND token = 'MPsviRsMaYBQvh4m3nWAuc/Pu4oOa0pHwO/Hwms+n08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00078

JSON explain

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