Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84e0397d70077d3512727efea5ef3e5163878f5b71033517e3be68c3ffc82d16' 
  AND token = 'Bu7oBwTToWJ2uTukwJSFWP7k1Qn+r2KRj8mHLInEblY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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