Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '433884fd601e76169335f56fe7bd823049ffa30d5ea30ce1b6a49743f91edfee' 
  AND token = 'WticsxCNVv7rh3vibUNNj8BybTStz1Nb2ZIhmJf5sZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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