Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d728bb76967935358db484e908deecc38bdbf33f2de16ab7e61aa4f1c2dfcfb' 
  AND token = 'mpnFHQy4AfY6ovEk9LUq5y4B88mweGPxG0We8jJwwso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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