Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6624faed42d005678dd452c2361bf55cd0992983fc7b522b0db2d8e57d61982b' 
  AND token = 'KQA1771bWS1c4eFZ5I54bbWvWbNW6bV+INswBcBZg7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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