Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fe0d0ce89764ae97e4a2d092c95b8bb4cdaae2c27895902879f85f5e82a3faa' 
  AND token = 'lfVeCwAVTMFdTNUa8R0EBkNbrpY9O5rHzYb+ZWzljn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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