Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07f6a6b3059150cb99e351d3b56de8f31571f13b1e2ee5b05cabfcf4a512682e' 
  AND token = 'g+msSOgRNLL5toHdZVfOJ6OC/JoUdMRXjzfzxwYW5HM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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