Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cde58d71afbd018f61d516c67f29de0123c1faabc3ebae00842685a90a48062b' 
  AND token = 'I3IW3T4qKjyyDYgz2v4oyiK70alMKFiIz/WegkVSOtA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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