Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27dead01526ba1469d1da7ddfdac7321ebf0caeeed9be3df693fcfc3b50ef35b' 
  AND token = 'wvoqdKOdaQIMHvobRINseWGHY7tyd39vMUsS4ufQlv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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