SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1edf6434326916a1c1d1c19c55d6baf8816eb99db3670be2ad03ffd2907a3fbb' 
  AND token = '+p+7mPNkUhzG4IgT3JqIKAZD7KzdHo0k/1ncIneYLIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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