Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24ea0737edece2830611b133131aed0ecb5745a9281158405eb0fb380c0751d4' 
  AND token = 'UvfvaCWd+Fqf8Y017KWIknbuos3pHfFrWQ3XX/miiRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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