Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1f3b9cef7747dcf654da80ebbfef6dadf2da6044684c044a244c08c5b35530b' 
  AND token = 'tZA0NyxLQAhDwW7kC4cdh3XCgTUGTrynJhTxX86sGCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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